All-cellulose composites via short-fiber dispersion approach using NaOH–water solvent

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • CNRS

Abstract

Abstract: All-cellulose composites were prepared by dispersing short softwood kraft fibers in dissolving pulp-8 wt% NaOH–water. The degree of polymerization of the dissolving pulp used for the matrix and the concentration of reinforcing fibers were varied. Morphology, density, crystallinity, cellulose I content and mechanical properties of the composites were investigated. A special attention was paid on the presence of non-dissolved fibers originating from incomplete dissolution of pulp in 8 wt% NaOH–water thus decreasing the actual concentration of dissolved cellulose in matrix solution. This “lack of matter” induced the formation of pores, which strongly influenced the morphology of composites. Density was shown to be the main parameter contributing to the mechanical properties of the prepared all-cellulose composites. The results demonstrate the complexity of the system and the need in taking into account the dissolution power of the solvent. Graphical abstract: Morphology of all-cellulose composites: matrix is from low-DP dissolving pulp (a) and from high-DP pulp (b).[Figure not available: see fulltext.].

Details

Original languageEnglish
Pages (from-to)4881-4893
Number of pages13
JournalCellulose
Volume26
Issue number8
Publication statusPublished - 30 May 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • All-cellulose composites, Density, Dissolution, Mechanical properties, NaOH

ID: 33576360